EP3387777B1 - Configuration de canal de commande de liaison montante pour porteuses sans licence - Google Patents

Configuration de canal de commande de liaison montante pour porteuses sans licence Download PDF

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Publication number
EP3387777B1
EP3387777B1 EP16816399.6A EP16816399A EP3387777B1 EP 3387777 B1 EP3387777 B1 EP 3387777B1 EP 16816399 A EP16816399 A EP 16816399A EP 3387777 B1 EP3387777 B1 EP 3387777B1
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Prior art keywords
pucch
wireless communication
uci
short
format
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German (de)
English (en)
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EP3387777A1 (fr
Inventor
Yu Yang
Fredrik Lindqvist
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Telefonaktiebolaget LM Ericsson AB
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Telefonaktiebolaget LM Ericsson AB
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Priority to PL16816399T priority Critical patent/PL3387777T3/pl
Priority to EP21191689.5A priority patent/EP3930250B1/fr
Publication of EP3387777A1 publication Critical patent/EP3387777A1/fr
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    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W72/00—Local resource management
    • H04W72/20—Control channels or signalling for resource management
    • H04W72/21—Control channels or signalling for resource management in the uplink direction of a wireless link, i.e. towards the network
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0053—Allocation of signalling, i.e. of overhead other than pilot signals
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L27/00—Modulated-carrier systems
    • H04L27/0006—Assessment of spectral gaps suitable for allocating digitally modulated signals, e.g. for carrier allocation in cognitive radio
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L1/00—Arrangements for detecting or preventing errors in the information received
    • H04L1/12—Arrangements for detecting or preventing errors in the information received by using return channel
    • H04L1/16—Arrangements for detecting or preventing errors in the information received by using return channel in which the return channel carries supervisory signals, e.g. repetition request signals
    • H04L1/1607—Details of the supervisory signal
    • H04L1/1614—Details of the supervisory signal using bitmaps
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/0001—Arrangements for dividing the transmission path
    • H04L5/0003—Two-dimensional division
    • H04L5/0005—Time-frequency
    • H04L5/0007—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT
    • H04L5/001—Time-frequency the frequencies being orthogonal, e.g. OFDM(A) or DMT the frequencies being arranged in component carriers
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04L—TRANSMISSION OF DIGITAL INFORMATION, e.g. TELEGRAPHIC COMMUNICATION
    • H04L5/00—Arrangements affording multiple use of the transmission path
    • H04L5/003—Arrangements for allocating sub-channels of the transmission path
    • H04L5/0048—Allocation of pilot signals, i.e. of signals known to the receiver
    • H04L5/0051—Allocation of pilot signals, i.e. of signals known to the receiver of dedicated pilots, i.e. pilots destined for a single user or terminal
    • H—ELECTRICITY
    • H04—ELECTRIC COMMUNICATION TECHNIQUE
    • H04W—WIRELESS COMMUNICATION NETWORKS
    • H04W16/00—Network planning, e.g. coverage or traffic planning tools; Network deployment, e.g. resource partitioning or cells structures
    • H04W16/14—Spectrum sharing arrangements between different networks

Definitions

  • the disclosed subject matter relates generally to telecommunications. Certain embodiments relate more particularly to uplink control channel configuration for unlicensed carriers.
  • LTE Long-Term Evolution
  • LTE-U unlicensed spectrum
  • 3GPP 3 rd Generation Partnership Project
  • Rel-14 Rel-14
  • LAA Uplink Licensed-Assisted Access
  • UEs LTE User Equipments
  • 5 GHz or license-shared 3.5 GHz radio spectrum For standalone LTE-U, initial random access and subsequent UL transmissions take place entirely on unlicensed spectrum. Regulatory requirements may prohibit transmissions in the unlicensed spectrum without prior channel sensing.
  • LBT listen-before-talk
  • Wi-Fi Wireless Local Area Network
  • LTE uses Orthogonal Frequency Division Multiplexing (OFDM) in the downlink and Discrete Fourier Transform spread (DFT-spread) OFDM (also referred to as single-carrier FDMA [SC-FDMA]) in the uplink.
  • OFDM Orthogonal Frequency Division Multiplexing
  • DFT-spread Discrete Fourier Transform spread
  • SC-FDMA single-carrier FDMA
  • the basic LTE downlink physical resource can thus be seen as a time-frequency grid as illustrated in Figure ( FIG.) 1 , where each resource element corresponds to one OFDM subcarrier during one OFDM symbol interval.
  • the uplink subframe has the same subcarrier spacing (15 kHz) as the downlink and the same number of SC-FDMA symbols in the time domain as OFDM symbols in the downlink.
  • Each subframe comprises two slots of duration 0.5 ms each, and the slot numbering within a frame ranges from 0 to 19.
  • one subframe comprises 14 OFDM symbols. The duration of each symbol is approximately 71.4 ⁇ s when including the cyclic prefix.
  • resource allocation in LTE is typically described in terms of resource blocks, where a resource block corresponds to 12 contiguous subcarriers in the frequency domain. Resource blocks are numbered in the frequency domain, starting from 0 at one end of the system bandwidth.
  • Unlicensed spectrum can, by definition, be simultaneously used/shared by multiple different technologies. Therefore, LTE should consider coexistence with other systems such as IEEE 802.11 (Wi-Fi). Operating LTE in the same manner in unlicensed spectrum as in licensed spectrum can seriously degrade the performance of Wi-Fi as Wi-Fi will not transmit once it detects the channel is occupied.
  • Wi-Fi IEEE 802.11
  • one way to utilize unlicensed spectrum reliably is to transmit essential control signals and channels on a licensed carrier.
  • a UE is connected to a PCell in the licensed band and one or more SCells in the unlicensed band.
  • a secondary cell in unlicensed spectrum is referred to as a licensed-assisted access secondary cell (LAA SCell).
  • LAA SCell licensed-assisted access secondary cell
  • MuLTEfire A new industry forum has been initiated on extending LTE to operate entirely on unlicensed spectrum in a standalone mode, which is referred to as "MuLTEfire".
  • MuLTEfire there is no licensed carrier for essential control signals transmissions and control channels. Accordingly, all transmission occurs on unlicensed spectrum with no guaranteed channel access availability, yet it must also fulfill the regulatory requirements on the unlicensed spectrum.
  • uplink control information such as HARQ-ACK, CSI are sent from UE to eNB on the control channel PUCCH when there is no UL-SCH data scheduled.
  • the PUCCH design up to Rel-13 is only for carriers in licensed spectrum, which is not possible to be reused for carriers in unlicensed spectrum due to regulatory requirements.
  • special consideration should be given when designing the PUCCH on carriers in unlicensed spectrum.
  • Certain embodiments of the disclosed subject matter provide a physical layer design of uplink control channel (e.g., PUCCH) format for LAA/standalone LTE-U.
  • PUCCH physical layer design of uplink control channel
  • Various alternative embodiments may employ either or both of two PUCCH formats, including a short PUCCH and a long PUCCH.
  • the two different PUCCH formats can be considered for UCI transmission depending on e.g. eNB timing configuration and/or HARQ protocol.
  • the short PUCCH typically occupies less than one subframe (e.g. 1-4 SC-FDMA/OFDM symbols) in the time domain, while the long PUCCH typically occupies 1 subframe. Both formats span the entire bandwidth with interlacing. UE multiplexing is supported on both formats using Orthogonal Cover Codes (OCC) and Cyclic Shifts (CS) on data symbols and reference symbols.
  • OCC Orthogonal Cover Codes
  • CS Cyclic Shifts
  • the normal PUCCH can also be multiplexed with PUSCH transmission from same or different UEs.
  • the establishment and/or use of a particular PUCCH format may be coordinated by one or more radio access nodes.
  • Such coordination may include, for instance, determining the format and signaling scheduling and/or format information from the one or more radio access nodes to one or more wireless communication devices.
  • the determining of the format may include e.g. selecting a PUCCH format according to an eNB timing configuration or a HARQ protocol.
  • the signaling may take the form of e.g. downlink control signaling or radio resource control (RRC) configuration signaling.
  • RRC radio resource control
  • Some embodiments may provide various potential benefits compared to conventional approaches. Some embodiments may, for instance, allow UCI to be transmitted on PUCCH on carriers in unlicensed spectrum; some embodiments may allow similar functionality as legacy LTE PUCCH to be maintained; and some embodiments may allow UE multiplexing to be supported on new PUCCH formats.
  • the following embodiments include physical layer configuration of PUCCH in unlicensed spectrum. Certain methods or concepts described below may be used for both single- and multi-carrier transmissions. The proposed approaches may also apply to different variations of LTE operating in unlicensed spectrum, such as LAA, LTE-U and standalone LTE-U.
  • short PUCCH refers to a PUCCH that is relatively short in the time domain, e.g., less than 1 subframe.
  • a short PUCCH may occupy 1-4 SC-FDMA or OFDM symbols depending on eNB configuration.
  • a short PUCCH may span the whole bandwidth by interlacing.
  • long PUCCH refers to a PUCCH that is relatively long in the time domain, e.g., 1 subframe. In the frequency domain, a long PUCCH may span the whole bandwidth by interlacing.
  • a short PUCCH or long PUCCH is considered to span the whole bandwidth by interlacing if the interlaces of the short PUCCH or long PUCCH are included in an interlacing pattern that spans the entire bandwidth, as illustrated e.g. in FIG. 7 .
  • Terms such as “whole bandwidth”, “entire bandwidth”, “entire system bandwidth”, and so on, generally refer to the transmission bandwidth of a carrier. For instance, such terms may refer to the transmission bandwidth of a 10MHz or 20MHz carrier, which may be slightly less than 10MHz or 20MHz, respectively.
  • interlacing refers to a technique in which physical resources are assigned or allocated according to a pattern such as one of those illustrated in FIGS. 4-5 and 7-10 , for instance.
  • interlace refers to a set of physical resources that forms part of an interlacing pattern, with an example interlace being two symbols of a resource block as shown in FIG. 4 or two resource blocks as shown in FIG. 7 .
  • interlacing is considered to be performed at a resource block level if an interlace spans a set of subcarriers that corresponds to the size of a resource block in the frequency domain.
  • FIGS. 4 and 7 both show examples of interlacing at a resource block level.
  • interlacing is considered to be performed at a subcarrier level if an interlace only spans a subcarrier in the frequency domain.
  • interlacing at a resource block level can also be referred to as block-interleaved frequency division multiple access (B-IFDMA), with which an inverse Fourier transform (IFFT) of the illustrated PUCCH physical resources with zero values in between, create a time domain waveform being referred to as a B-IFDMA symbol.
  • IFFT inverse Fourier transform
  • the size of the mentioned IFFT (in the transmitter) typically corresponds to the system bandwidth.
  • An example of B-IFDMA is shown in FIG.
  • a third interlace is assigned out of 10 possible.
  • FIG. 4 shows an example of short PUCCH occupying two symbols in the time domain and one interlace in the frequency domain.
  • demodulation reference signal DMRS
  • DMRS demodulation reference signal
  • DMRS is sent on every few number of subcarriers, e.g., 6 subcarriers (e.g. to enable more PUCCH data) whose pattern can be shifted or unshifted on different B-IFDMA symbols, as illustrated in the right-most part of FIG. 4 .
  • PUCCH UEs can be multiplexed on a PUCCH resource by various alternative approaches as explained below.
  • PUCCH UEs can also be multiplexed with PUSCH UEs in the same subframe in a way that PUSCH transmission for other UEs occupying other interlacing patterns as shown in FIG. 5 .
  • PUCCH multiplexing in one example PUCCH UEs are assigned different interlacing patterns, i.e., frequency division multiplexing.
  • multiple PUCCH UEs are assigned the same interlacing pattern, in which case UEs apply different Orthogonal Cover Codes (OCC) to enable multiplexing of
  • FIG. 19 shows examples of inter-DS OCC length-2 (top of FIG. 19 ) and intra-DS OCC length-2 (bottom of FIG. 19 ) with bipolar Hadamard OCC.
  • FIG. 6 shows an example of two PUCCH UEs DS multiplexing on the same interlace(s) with N PRB PRBs.
  • OCC spreading is applied within a symbol in the frequency domain for the total number of allocated subcarriers (SC).
  • SC subcarriers
  • the OCC spreading within a symbol is similar to FIG. 6 but instead typically applied per physical resource block (PRB) and furthermore before the transmitter DFT.
  • PRB physical resource block
  • FIG. 6 exemplifies the case where 2 UEs are multiplexed.
  • the 2 UE multiplexing case corresponds to that each UE applies an OCC-length of 2 (i.e., 2 repeated symbols).
  • An extension to multiplexing e.g. 4 or 6 UEs with B-IFDMA using intra-symbol OCC on a PRB-basis follows directly by instead applying an OCC of length-4 or length-6 (i.e., repeating 4 or 6 subcarriers within each PRB).
  • the OCC sequences can for example be based on a Hadamard matrix with +1, -1 as in FIG.
  • OCC orthogonal matrix
  • DS data symbols
  • the OCC can be applied after the transmitter modulation, i.e., in the time domain.
  • the inter-symbol OCC can be applied in the frequency domain or before the transmitter DFT, since it corresponds to scalar multiplication.
  • the reference symbols are using existing DMRS sequences in LTE uplink based on Zadoff-Chu sequence (assuming > 2 PRBs, for fewer PRBs other sequences are used). Multiple UEs are typically using the same root sequence and transmit RS on the same time-frequency resources. For RS multiplexing, different cyclic shifts are applied for different UEs.
  • the HARQ feedback and the corresponding process IDs could either be listed explicitly or e.g. be provided as a bitmap (one or two bits per process).
  • the UCI on short PUCCH (sPUCCH) is attached with an 8-bit CRC and encoded using Tail Biting Convolutional Code (TBCC) for medium to large payload size, e.g., > 16-20 bits payload.
  • TBCC Tail Biting Convolutional Code
  • a block code may be used without CRC to improve the performance, for instance, a Reed-Muller code as utilized by LTE.
  • Other encoding types could also be used.
  • the encoded symbols are mapped to available resource elements (Res), e.g., in a frequency first time second manner. Similar features may also be used in relation to long PUCCH.
  • FIG. 7 shows an example of a long PUCCH, where the PUCCH occupies one interlace in one subframe with two DMRS symbols per subframe. Other number of DMRS per subframe could also be used, e.g. 4 symbols per subframe as in LTE PUCCH format 3.
  • long PUCCH occupies 1 subframe in the time domain, and it spans the whole bandwidth by interlacing in the frequency domain.
  • Demodulation reference signal DMRS
  • DMRS Demodulation reference signal
  • multiple PUCCH UEs can also be multiplexed using long PUCCH.
  • PUCCH UEs can also be multiplexed with PUSCH UEs in the same subframe using different interlacing patterns for PUCCH data and PUSCH data transmissions as shown in FIG. 8 without frequency hopping.
  • frequency hopping is enabled and UEs are multiplexed by using the hopped resources.
  • One example is to have symbol-based frequency hopping as shown in FIG. 9 (where the interlace numbering refers to the location used at the first symbol in the subframe).
  • PUCCH UEs are assigned different interlacing patterns compared to PUSCH UEs and other PUCCH UEs.
  • multiple PUCCH UEs are assigned the same interlacing pattern.
  • UEs apply different Orthogonal Cover Codes (OCC) to be multiplexed on the same time-frequency resources.
  • OCC Orthogonal Cover Codes
  • OCC is applied before DFT.
  • OCC spreading is applied between B-IFDMA symbols which contain DS.
  • the reference symbols use existing DMRS sequences in LTE uplink based on Zadoff-Chu sequence (assuming > 2 PRBs). Multiple UEs use the same root sequence and transmit RS on the same time-frequency resources. For RS multiplexing, in one example, the multiple PUCCH and PUSCH UEs apply different cyclic shifts within one RS symbol.
  • two UEs are multiplexed using OCC [1 1] and [1 -1] on the two DMRS symbols.
  • multiple UEs apply both OCC between DMRS symbols and cyclic shifts within one DMRS symbol as shown in FIG. 10 .
  • the PUSCH UEs can apply OCC [1 1] for the DMRSs while the PUCCH UEs apply OCC [1 -1].
  • the total number of DMRS CS i.e., resources
  • the described embodiments may be implemented in any appropriate type of communication system supporting any suitable communication standards and using any suitable components.
  • certain embodiments may be implemented in an LTE network, such as that illustrated in FIG. 11 .
  • a communication network 1100 comprises a plurality of wireless communication devices 1105 (e.g., conventional UEs, machine type communication [MTC] / machine-to-machine [M2M] UEs) and a plurality of radio access nodes 1110 (e.g., eNodeBs or other base stations).
  • Communication network 1100 is organized into cells 1115, which are connected to a core network 120 via corresponding to radio access nodes 1110.
  • Radio access nodes 1110 are capable of communicating with wireless communication devices 1105 along with any additional elements suitable to support communication between wireless communication devices or between a wireless communication device and another communication device (such as a landline telephone).
  • wireless communication devices 1105 may represent communication devices that include any suitable combination of hardware and/or software, these wireless communication devices may, in certain embodiments, represent devices such as an example wireless communication device illustrated in greater detail by FIG. 12 .
  • the illustrated radio access node may represent network nodes that include any suitable combination of hardware and/or software, these nodes may, in particular embodiments, represent devices such as the example radio access node illustrated in greater detail by FIG. 13 .
  • a wireless communication device 1200 comprises a processor 1205, a memory, a transceiver 1215, and an antenna 1220.
  • the device processor executing instructions stored on a computer-readable medium, such as the memory shown in FIG. 12 .
  • Alternative embodiments may include additional components beyond those shown in FIG. 12 that may be responsible for providing certain aspects of the device's functionality, including any of the functionality described herein.
  • a radio access node 1300 comprises a node processor 1305, a memory 1310, a network interface 1315, a transceiver 1320, and an antenna 1325.
  • node processor 1305 executing instructions stored on a computer-readable medium, such as memory 1310 shown in FIG. 13 .
  • Alternative embodiments of radio access node 1300 may comprise additional components to provide additional functionality, such as the functionality described herein and/or related supporting functionality.
  • FIGS. 14-16 illustrate various methods and apparatuses in which some or all of the above features may potentially be implemented.
  • FIG. 14 is a flowchart illustrating a method 1400 of operating a wireless communication device. The method of FIG. 14 could be performed by a wireless communication device as illustrated in any of FIGS. 11 , 12 or 15 , for instance.
  • method 1400 comprises identifying a physical uplink control channel (PUCCH) format for transmission of uplink control information (UCI) in unlicensed spectrum, wherein the PUCCH format is short PUCCH or long PUCCH, wherein the short PUCCH occupies less than 1 subframe in the time domain and spans an entire system bandwidth in the frequency domain with interlacing on a resource block level, and wherein the long PUCCH occupies one subframe in the time domain and spans the entire system bandwidth in the frequency domain with interlacing on a resource block level (S1405), and transmitting the UCI to a radio access node in accordance with the identified PUCCH format (S1410).
  • PUCCH physical uplink control channel
  • UCI uplink control information
  • identifying" or “determining” a PUCCH format may be performed in various alternative ways, such as determining the format based on information available to the wireless communication device, reading an indication of the format from a memory in the wireless communication device, being preconfigured to use the format, receiving signaling from a radio access node that identifies the format, and so on.
  • the UCI is transmitted to the radio access node in coordination with one or more other wireless communication devices.
  • transmitting the UCI in coordination with the one or more other wireless communication devices comprises multiplexing with the one or more other wireless communication devices using orthogonal cover codes (OCC) and cyclic shifts (CS) on control-data symbols and reference symbols, respectively, in the short PUCCH or long PUCCH.
  • transmitting the UCI to the radio access node in coordination with the one or more other wireless communication devices comprises multiplexing the one or more other wireless communication devices on the same interlace as the short PUCCH or the long PUCCH.
  • the wireless communication device and the one or more other wireless communication devices are assigned different interlacing patterns.
  • the wireless communication device and the one or more other wireless communication devices are assigned the same interlacing pattern, and they apply different orthogonal cover codes (OCC) to enable PUCCH control-data on the same time-frequency resources.
  • the PUCCH format is short PUCCH and the short PUCCH comprises at least one demodulation reference signal (DMRS) symbol and at least one control-data symbol in the time domain.
  • the short PUCCH comprises a sequence of symbols at the end of a downlink partial subframe.
  • the PUCCH format is short PUCCH and the transmitting comprises transmitting a demodulation reference signal (DMRS) symbol on all subcarriers within a block-interleaved frequency division multiple access (B-IFDMA) symbol on an assigned interlace or on all assigned interlaces across the entire system bandwidth.
  • DMRS demodulation reference signal
  • B-IFDMA block-interleaved frequency division multiple access
  • the PUCCH format is short PUCCH and the transmitting comprises transmitting a demodulation reference signal (DMRS) symbol once per "n" subcarriers with a pattern that can be shifted or unshifted on different B-IFDMA symbols, where "n" is an integer greater than 1.
  • DMRS demodulation reference signal
  • FIG. 15 is a diagram illustrating a wireless communication device 1500.
  • wireless communication device 1500 comprises an identification module 1505 configured to identify a PUCCH format as in S1405, and a transmission module 1510 configured to transmit the UCI as in S1410.
  • Wireless communication device 1500 may further comprise additional modules configured to perform additional functions as described above in relation to FIG. 14 , for instance.
  • module denotes any suitable combination of hardware and/or software configured to perform a designated function.
  • the modules in FIG. 15 and other figures may be implemented by at least one processor and memory, one or more controllers, etc.
  • FIG. 16 is a flowchart illustrating a method 1600 of operating a radio access node. The method of FIG. 16 could be performed by a radio access node as illustrated in any of FIGS. 11 , 13 or 17 , for instance.
  • method 1600 comprises identifying a physical uplink control channel (PUCCH) format to be used by at least one wireless communication device for transmission of uplink control information (UCI) in unlicensed spectrum, wherein the PUCCH format is short PUCCH or long PUCCH, wherein the short PUCCH occupies less than 1 subframe in the time domain and spans an entire system bandwidth in the frequency domain with interlacing on a resource block level, and wherein the long PUCCH occupies one subframe in the time domain and spans the entire system bandwidth in the frequency domain with interlacing on a resource block level (S1605), and receiving the UCI from the at least one wireless communication device in accordance with the identified PUCCH format (S1610).
  • PUCCH physical uplink control channel
  • UCI uplink control information
  • identifying the PUCCH format comprises selecting between short PUCCH and long PUCCH according to at least one of an eNodeB timing configuration and a hybrid automatic repeat request (HARQ) protocol.
  • HARQ hybrid automatic repeat request
  • the received UCI is multiplexed on the same interlace as the short PUCCH or the long PUCCH with information transmitted from at least one other wireless communication device.
  • the PUCCH format is short PUCCH and the short PUCCH comprises at least one demodulation reference signal (DMRS) symbol and at least one control-data symbol in the time domain.
  • the short PUCCH comprises a sequence of symbols at the end of a downlink partial subframe.
  • the received UCI is multiplexed in the short PUCCH or long PUCCH with information transmitted from at least one other wireless communication device.
  • the UCI and the information transmitted from the at least one other wireless communication device are multiplexed using orthogonal cover codes (OCC) and cyclic shifts (CS) on control-data symbols and reference symbols, respectively.
  • OCC orthogonal cover codes
  • CS cyclic shifts
  • the PUCCH format comprises a demodulation reference signal (DMRS) symbol on all subcarriers within a block-interleaved frequency division multiple access (B-IFDMA) symbol on an assigned interlace or on all assigned interlaces across the entire system bandwidth.
  • the PUCCH format comprises a demodulation reference signal (DMRS) symbol once per "n" subcarriers with a pattern that can be shifted or unshifted on different B-IFDMA symbols, where "n" is an integer greater than 1.
  • the UCI is multiplexed with UCI from at least one other wireless communication device using different interlacing patterns within the same subframe.
  • the UCI is multiplexed with UCI from at least one other wireless communication device using the same interlacing pattern within the same subframe.
  • the UCI from the at least one wireless communication device and the at least one other wireless communication device are subject to different orthogonal cover codes (OCC).
  • FIG. 17 is a diagram illustrating a radio access node 1700.
  • radio access node 1700 comprises a determining module 1705 configured to determine or identify a PUCCH format as in S1605, and a receiving/decoding module 1710 configured to receive and decode the UCI as in S1610. Radio access node 1700 may further comprise additional modules configured to perform additional functions as described above in relation to FIG. 16 , for instance.
  • certain embodiments of the disclosed subject matter provide two PUCCH formats to be transmitted on carriers in unlicensed spectrum for LAA/Standalone LTE-U. Both formats use interlaced UL resources and can be multiplexed with other PUCCH/PUSCH UEs.

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Claims (15)

  1. Procédé (1400) de fonctionnement d'un dispositif de communication sans fil, comprenant :
    l'identification d'un format de canal de commande de liaison montante physique, PUCCH, pour la transmission d'informations de commande de liaison montante, UCI, dans un spectre sans licence,
    dans lequel le format PUCCH est PUCCH court ou PUCCH long, dans lequel le PUCCH court occupe moins de 1 sous-trame dans le domaine de temps et couvre une largeur de bande système entière dans le domaine de fréquence avec un entrelacement sur un niveau de bloc de ressource, et dans lequel le PUCCH long occupe une sous-trame dans le domaine de temps et couvre la largeur de bande système entière dans le domaine de fréquence avec un entrelacement sur un niveau de bloc de ressource (S1405) ; et
    la transmission des UCI à un nœud d'accès radio conformément au format PUCCH identifié (S1410).
  2. Procédé selon la revendication 1, dans lequel l'entrelacement sur un niveau de bloc de ressource comprend l'attribution de ressources physiques selon un entrelacement qui couvre un ensemble de sous-porteuses correspondant à une taille d'un bloc de ressource dans le domaine de fréquence.
  3. Procédé selon la revendication 1, dans lequel les UCI sont transmises au nœud d'accès radio en coordination avec un ou plusieurs autres dispositifs de communication sans fil.
  4. Procédé selon la revendication 3, dans lequel la transmission des UCI au nœud d'accès radio en coordination avec le ou les autres dispositifs de communication sans fil comprend le multiplexage du ou des autres dispositifs de communication sans fil sur le même entrelacement que le PUCCH court ou le PUCCH long.
  5. Procédé selon l'une quelconque des revendications 1 à 3, dans lequel le format PUCCH est PUCCH court et le PUCCH court comprend au moins un symbole de signal de référence de démodulation, DMRS, et au moins un symbole de données de commande dans le domaine de temps.
  6. Procédé selon la revendication 5, dans lequel le PUCCH court comprend une séquence de symboles à la fin d'une sous-trame partielle de liaison descendante.
  7. Procédé selon la revendication 3, dans lequel la transmission des UCI en coordination avec le ou les autres dispositifs de communication sans fil comprend le multiplexage avec le ou les autres dispositifs de communication sans fil en utilisant des codes de couverture orthogonaux, OCC, et des décalages cycliques, CS sur des symboles de données de commande et des symboles de référence, respectivement, dans le PUCCH court ou le PUCCH long.
  8. Dispositif de communication sans fil (1105, 1200), comprenant :
    au moins un processeur (1205) configuré pour mettre en œuvre le procédé selon l'une quelconque des revendications 1 à 7.
  9. Procédé (1600) de fonctionnement d'un nœud d'accès radio, comprenant :
    l'identification d'un format de canal de commande de liaison montante physique, PUCCH, à utiliser par au moins un dispositif de communication sans fil pour la transmission d'informations de commande de liaison montante, UCI, dans un spectre sans licence,
    dans lequel le PUCCH court occupe moins de 1 sous-trame dans le domaine de temps et couvre une largeur de bande système entière dans le domaine de fréquence avec un entrelacement sur un niveau de bloc de ressource, et dans lequel le PUCCH long occupe une sous-trame dans le domaine de temps et couvre la largeur de bande système entière dans le domaine de fréquence avec un entrelacement sur un niveau de bloc de ressource (S1605) ; et
    la réception des UCI depuis l'au moins un dispositif de communication sans fil conformément au format PUCCH identifié (S1610).
  10. Procédé selon la revendication 9, dans lequel l'identification du format PUCCH comprend la sélection entre PUCCH court et PUCCH long selon au moins un parmi une configuration de temporisation d'eNodeB et un protocole de demande de répétition automatique hybride, HARQ.
  11. Procédé selon l'une quelconque des revendications 9 à 10, dans lequel le format PUCCH est PUCCH court et le PUCCH court comprend au moins un symbole de signal de référence de démodulation, DMRS, et au moins un symbole de données de commande dans le domaine de temps.
  12. Procédé selon la revendication 11, dans lequel le PUCCH court comprend une séquence de symboles à la fin d'une sous-trame partielle de liaison descendante.
  13. Procédé selon la revendication 9, dans lequel les UCI reçues sont multiplexées dans le PUCCH court ou le PUCCH long avec des informations transmises depuis au moins un autre dispositif de communication sans fil.
  14. Procédé selon la revendication 13, dans lequel les UCI et les informations transmises depuis l'au moins un autre dispositif de communication sans fil sont multiplexées en utilisant des codes de couverture orthogonaux, OCC, et des décalages cycliques, CS, sur des symboles de données de commande et des symboles de référence, respectivement.
  15. Nœud d'accès radio (1110, 1300), comprenant :
    au moins un processeur (1305) et de la mémoire (1310) configurés collectivement pour mettre en œuvre le procédé de l'une quelconque des revendications 9 à 14.
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PL3387777T3 (pl) 2022-01-17
US9854569B2 (en) 2017-12-26
EP3930250C0 (fr) 2025-02-05
EP3930250A1 (fr) 2021-12-29
BR112018011377A2 (pt) 2018-12-04
US20170164352A1 (en) 2017-06-08
EP3930250B1 (fr) 2025-02-05
DK3387777T3 (da) 2021-10-11
CN108370297A (zh) 2018-08-03
US20190007937A1 (en) 2019-01-03
EP3387777A1 (fr) 2018-10-17
SG11201803939VA (en) 2018-06-28
ES2895040T3 (es) 2022-02-17
JP6717942B2 (ja) 2020-07-08
WO2017098414A1 (fr) 2017-06-15
ES3013564T3 (en) 2025-04-14
JP2019504543A (ja) 2019-02-14
CN108370297B (zh) 2021-03-09

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